Propagation of a cos-Gaussian beam in a Kerr medium

被引：11
|
作者：
Chen, Ruipin [1 ,2 ,3 ]
Ni, Yongzhou [1 ]
Chu, XiuXiang [1 ]
机构：
[1] Zhejiang A&F Univ, Sch Sci, Lin An 311300, Zhejiang, Peoples R China
[2] Nanjing Univ, Nanjing Natl Lab Microstruct, Nanjing 210093, Peoples R China
[3] Nanjing Univ, Dept Phys, Nanjing 210093, Peoples R China
来源：
OPTICS AND LASER TECHNOLOGY | 2011年 / 43卷 / 03期
关键词：
Nonlinear optics; Kerr effect; Cos Gaussian beam; COMPLEX OPTICAL-SYSTEMS; TURBULENT ATMOSPHERE; LASER-BEAMS;
D O I：
10.1016/j.optlastec.2010.07.005
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
The dynamic properties of cos-Gaussian beams in the presence of Kerr nonlinearity are investigated analytically and numerically using the nonlinear Schrodinger equation (NLS) Based on the moments method evolution of a cos-Gaussian beam width in the root-mean-square (RMS) sense is obtained analytically The beam propagation factors and the critical powers of the cos-Gaussian beams with a uniform wavefront are calculated Using numerical simulation it is found that although the RMS beam width broadens the central parts of the beam give rise to an initial radial compression and a significant redistribution during propagation The partial collapse of central parts of the beam is observed below the threshold for a global collapse The cos-Gaussian beams eventually convert into cosh-Gaussian type beams in Kerr media with low initial power (C) 2010 Elsevier Ltd All rights reserved
引用
收藏
页码：483 / 487
页数：5
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